The Hawkins family try to get their lives back on track. Niska is driven to a fateful decision while on the run in Berlin. Leo, Max and Mia are living in hiding near a coastal town when they are threatened by a mysterious organization.

Laura must decide whether to accept Niska's request, while Karen and Pete learn about a special Synth being sold for unprecedented amounts on the black market. Hester uses questionable means to gain information from her prisoner, and Leo faces a new mission. Mia takes a risk to help Ed but is her secret now in jeopardy?